Device for cutting glass



UNITED STATES PATENT OFFICE. y

A. S. MCCLURE, OF NEW BUFFALO, PENNSYLVANIA.

DEVICE FOR CUTTING GLASS.

Specitication forming part of ALetters Patent No. 44,331, dated September 20, 1864.

To all whom it may concern Be it known that I, A. S. MCOLURE, of New Buffalo, in the county of Perry, in the State of Pennsylvania, have invented a new and Improved Instrument for Cnt-ting Glass; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings.

The nature of my invention consists in making glass-cutters oi' cast-steel by reiining and tempering, which gives to the metal a superior qualification.

To enable others skilled in the art to make and use my invention, I Will proceed to des '.ribe its construction.

Figure 1 represents the steel cutter with fiur edges or square points, as inserted in a handle. Fig. 2 represents a single-edge cutter without a handle.

A represents the shape ot'a one-edged steel glass-cutter with recesses B for the finger to have a good hold on it, and a jaw, C, at' the lower end for the purpose of breaking oi' any portions of the glass as cut. The cuttingend D is tapered oit' similar to anordinary r in screw-driver.

E represents a square cutter with four edges, G, the instrument inserted in a handle, H

My present invention answers the purpose of a diamond, and its cheapness is of importance to mechanics.

My new and improved mode of tempering and refining the steel for glass-cutters (which I have fully tested for oneyear past) is to add to the water that I temper in ten grains of crude niter and ten grains ot' zinc sulphate to each quart of water, and heat the steel in a charcoal-nre to a light cherry-red, then immerse suddenly, constantly shaking or moving it lill cool. This makes a great improvement in the instrument over the former. It cuts better and lasts longer without sharpening. Besides, it gives it a superior polish that will not rust.

What I claim as my invention, and desire to secure by Letters Patent, is

My steel glass-cutters as an article of manufacture, as herein constructed and described, and for the purpose set forth.

A. S. MCOLURE.

Witnesses:

J oHN GAMET, VALENTINE VARNs. 

